Red LED Blinker Circuit Design
verified values and sized the board
0:39
Running calculation.
Checking 9 design areas.
Reading schematic details for J1, SW1, U1 and 8 more.
Editing board size.
Thought
- Set Layout's sizeX to "50mm"
- Set Layout's sizeY to "50mm"
- Set Layout's boardShape to "rectangle"
- Set Layout's cornerRadius to "2mm"
- Set Layout's stackup to "Standard 2 Layer"
- Set Layout's boardInsetMargin to "0.3mm"
- Set Layout's keepOut to "0.3mm"
Thought
- Set C1's Voltage Rating to "16V"
- Set C2's Voltage Rating to "16V"
- Set C3's Voltage Rating to "50V"
- Set C4's Voltage Rating to "50V"
- Set R1's Power Rating to "0.25W"
- Set R2's Power Rating to "0.25W"
- Set R3's Power Rating to "0.25W"
Thought
- Connected SW1:3, SW1:1 to ^Net 1
nets {
net BAT_POS = SW1:2, J1:POS;
net Net 1 = SW1:3, SW1:1;
}
Execution stopped by user.
0:07
Read layout.
Started: final review of schematic and layout.
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Design Notes
9V NE555 LED Blinker
- Target blink frequency: approximately 1 Hz
- Timer topology: NE555 astable oscillator
- Timing values selected: R1 = 10k, R2 = 68k, C = 10uF
- Calculated frequency: 1.44 / ((10k + 2 x 68k) x 10uF) = 0.9863 Hz
- LED series resistor selected: 1k for comfortable brightness from a 9V-powered output stage
- Supply stabilization: 47uF bulk capacitor across switched 9V rail
- Local bypassing: 100nF from VCC to GND at the NE555 and 10nF from CTRL to GND
- Hand-solderable choices: DIP-8 NE555, through-hole switch, through-hole battery connector, axial resistors, radial/disc capacitors, 5mm through-hole LED
9V NE555 LED Blinker
